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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Sediment transport in response to changes in river discharge and tidal mixing in a funnel-shaped micro-tidal estuary
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Sediment transport in response to changes in river discharge and tidal mixing in a funnel-shaped micro-tidal estuary

机译：漏斗状微潮河口泥沙响应河水流量变化和潮汐混合

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摘要

Huangmaohai Estuary is a micro-tidal funnel-shaped estuary, located along the southwestern side of the Pearl River Delta complex. Variations of sediment transport patterns under different conditions of river discharge and tidal mixing are investigated by using field measurements and data analysis during both dry and wet seasons, respectively. The intratidal variation of sediment dynamics is largely controlled by the tidal asymmetry. The typical pattern of 25-hour mean sediment transport during the dry season is that the transport is landward in the channel and seaward on the shoals. A bifurcation pathway of sediment transport shows that sediments are imported from the East Opening and exported through the Middle Opening. However, this pattern can be altered by mixing processes and river discharge. Enhanced mixing or increased discharge can result in a predominantly seaward transport. Conversely, weak mixing can result in an emphatic landward transport. In general, the sediment transport is closely associated with the morphological evolution in the estuary.
机译：黄茅海河口是一个微潮漏斗状的河口，位于珠江三角洲综合体的西南侧。通过分别在旱季和雨季进行的实地测量和数据分析，研究了在不同的河流排放和潮汐混合条件下，泥沙输送方式的变化。潮汐沉积物动力学变化主要受潮汐不对称性控制。干旱季节25小时平均泥沙运移的典型模式是，该运移是在河道内向岸输送，在浅滩向海输送。输沙的分叉路径表明，沉积物是从东口进口的，而通过中口出口的。但是，可以通过混合过程和河流排放来改变这种模式。增强的混合或增加的排放会导致主要向海运输。相反，弱混合会导致明显的陆运。通常，沉积物的运输与河口的形态演变密切相关。

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